bsplayer isn't able to play your file "as is" because the index of the avi file needs to be reconstructed (something like that, don't ask for more ;))
AVIpreview is specifically designed to do this
to play Xvid files you need... the Xvid codec :roll:
you can find Koepi's version as a binary
here
(only developpers use the sources, others download the binary)
an alternative is to use
ffdshow which can act as a replacement for some codecs, namely xvid, divx (any version), mp43 ...
with either xvid codec or ffdshow installed, AVIpreview should be able to show the video